The older AIO code awakened all pending AIO requests on a socket
when any data arrived. This could result in AIO daemons blocking on
an empty socket buffer. These requests could not be cancelled
which led to a deadlock during process exit. This test reproduces
this case. The newer AIO code is able to cancel the pending AIO
request correctly.
Reviewed by: ngie (-ish)
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D4363
The large read test uses an empty file created via mkstemp() rather than
/dev/null as character devices are subject to two different clamping
sysctls. However, I forgot to update some of the error messages after
changing to mkstemp() that were still referring to /dev/null.
root, or the geom class can't be loaded cleanly [*]
This makes sure that scenarios that are easy to hit aren't counted
as false positives with kyua test
MFC after: 1 week
PR: 208101
Sponsored by: EMC / Isilon Storage Division
First, update the return types of aio_return() and aio_waitcomplete() to
ssize_t.
POSIX requires aio_return() to return a ssize_t so that it can represent
all return values from read() and write(). aio_waitcomplete() should use
ssize_t for the same reason.
aio_return() has used ssize_t in <aio.h> since r31620 but the manpage and
system call entry were not updated. aio_waitcomplete() has always
returned int.
Note that this does not require new system call stubs as this is
effectively only an API change in how the compiler interprets the return
value.
Second, allow aio_nbytes values up to IOSIZE_MAX instead of just INT_MAX.
aio_read/write should now honor the same length limits as normal read/write.
Third, use longs instead of ints in the aio_return() and aio_waitcomplete()
system call functions so that the 64-bit size_t in the in-kernel aiocb
isn't truncated to 32-bits before being copied out to userland or
being returned.
Finally, a simple test has been added to verify the bounds checking on the
maximum read size from a file.
improve cancellation robustness.
Introduce a new file operation, fo_aio_queue, which is responsible for
queueing and completing an asynchronous I/O request for a given file.
The AIO subystem now exports library of routines to manipulate AIO
requests as well as the ability to run a handler function in the
"default" pool of AIO daemons to service a request.
A default implementation for file types which do not include an
fo_aio_queue method queues requests to the "default" pool invoking the
fo_read or fo_write methods as before.
The AIO subsystem permits file types to install a private "cancel"
routine when a request is queued to permit safe dequeueing and cleanup
of cancelled requests.
Sockets now use their own pool of AIO daemons and service per-socket
requests in FIFO order. Socket requests will not block indefinitely
permitting timely cancellation of all requests.
Due to the now-tight coupling of the AIO subsystem with file types,
the AIO subsystem is now a standard part of all kernels. The VFS_AIO
kernel option and aio.ko module are gone.
Many file types may block indefinitely in their fo_read or fo_write
callbacks resulting in a hung AIO daemon. This can result in hung
user processes (when processes attempt to cancel all outstanding
requests during exit) or a hung system. To protect against this, AIO
requests are only permitted for known "safe" files by default. AIO
requests for all file types can be enabled by setting the new
vfs.aio.enable_usafe sysctl to a non-zero value. The AIO tests have
been updated to skip operations on unsafe file types if the sysctl is
zero.
Currently, AIO requests on sockets and raw disks are considered safe
and are enabled by default. aio_mlock() is also enabled by default.
Reviewed by: cem, jilles
Discussed with: kib (earlier version)
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D5289
r274560 modified kqueue_register() to only test the event condition if the
corresponding knote is not disabled. However, this check takes place before
the EV_ENABLE flag is used to clear the KN_DISABLED flag on the knote, so
enabling a previously-disabled kevent would not result in a notification for
a triggered event. This change fixes the problem by testing for EV_ENABLED
before possibly checking the event condition.
This change also updates a kqueue regression test to exercise this case.
PR: 206368
Reviewed by: kib
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D5307
before calling dd to defeat a race when writing out to the geom_gate(4)
device
MFC after: 1 month
Reported by: Jenkins
Sponsored by: EMC / Isilon Storage Division
fact that Jenkins hardcodes image sizes to 2GB with the FreeBSD_HEAD
job
This is to stop the unnecessary failure emails because we've gone
over the 2GB limit
MFC after: 1 week
X-MFC with: r295341
Sponsored by: EMC / Isilon Storage Division
For cases where these utilities aren't installed, the tests would fail today
in a non-intuitive manner on sub-testcase #3 in each of the test scripts
MFC after: 1 week
Reviewed by: markj
Sponsored by: EMC / Isilon Storage Division
ggated(8) daemon used by the tests is the instance specifically invoked by
the tests instead of one or more daemon instances running on the system
MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division
dd to defeat a race when writing out to the geom_gate(4) device
This will quell the Jenkins failure emails until I come up with a better
solution
MFC after: 1 month
Reported by: Jenkins
Sponsored by: EMC / Isilon Storage Division
NOTE_CHILD and NOTE_EXIT return something in kevent.data: the parent
pid (ppid) for NOTE_CHILD and the exit status for NOTE_EXIT.
Do not let the two events be combined, since one would overwrite
the other's data.
PR: 180385
Submitted by: David A. Bright <david_a_bright@dell.com>
Reviewed by: jhb
MFC after: 1 month
Sponsored by: Dell Inc.
Differential Revision: https://reviews.freebsd.org/D4900
tools/regression/geom_{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}
in to the FreeBSD test suite as
tests/sys/geom/class/{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}
The tools/regression/geom and tools/regression/geom_part testcases are being
left alone because both test sets are both currently broken.
The majority of this work was done on ^/user/ngie/more-tests2 . The differences
are as follows:
- tests/sys/geom/class/Makefile.inc is not present; it was
inlined into the class's Makefiles for explicitness.
- The testcases officially require root via kyua
- The geom_gate(4) tests don't use the pidfile changes proposed in
https://reviews.freebsd.org/D4836 .
MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division
suite as tests/sys/kern/unix_passfd_test
- Convert testcases to ATF
- Fix an alignment issues
- Mark rights_creds_payload(..) as an expected failure (see PR # 181741)
Based [in part] on the following Differential Revision:
https://reviews.freebsd.org/D689
MFC after: 1 week
Submitted by: markj
Sponsored by: EMC / Isilon Storage Division
Add two new LWPINFO flags: PL_FLAG_BORN and PL_FLAG_EXITED for reporting
thread creation and destruction. Newly created threads will stop to report
PL_FLAG_BORN before returning to userland and exiting threads will stop to
report PL_FLAG_EXIT before exiting completely. Both of these events are
only enabled and reported if PT_LWP_EVENTS is enabled on a process.
- Add #ifdef TEST_SEQ_PACKET_SOURCE_ADDRESS` for untestable code
because FreeBSD doesn't have a means to map source addresses for
SEQ_PACKET AF_UNIX sockets (paraphrased). Put pathname variable
under the #ifdef to mute another unused but set variable warning
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
sane
- Push the kqueue(2) initialization down so the errno will correspond with
the failure instead of potentially being stomped on by functions called
by `PLAIN_REQUIRE_KERNEL_MODULE`
- Delete trailing whitespace
- Add spaces between braces for conditional and control blocks (for/if)
- Use err/errx instead of perror+printf+exit/printf+exit.
- Remove braces for single-line conditionals
Tested with and without -DDEBUG
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
-Wunused-but-set-variable warnings reported by gcc 4.9
Remove some trailing whitespace as well
Tested with and without -DDEBUG
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
I realize that these tests could be run before mac_bsdextended is loaded, but
it would overcomplicate things to special case handle the testcases before doing
the mac_bsdextended(4) feature check
The testcases will be split up so they can be run separately in the near future
MFC after: 3 days
Sponsored by: EMC / Isilon Storage Division
tools/regression/mac/mac_portacl into the FreeBSD test suite as
tests/sys/mac/bsdextended and tests/sys/mac/portacl, respectively
MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division
testing for kernel features via the feature_present(3) libcall
The semantics are similar to the other macros in the header (skip
testcase with ATF macro; exit with appropriate exit code with the
PLAIN macro)
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
Really this should not be a DPSRCS. The acct_test.c should not #include
convert.c, but just link it in as a normal SRCS.
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
